From dd8f7a6cfdce76078c1deb3d39e6f95edc1283c1 Mon Sep 17 00:00:00 2001
From: glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 28 Jul 2013 08:49:25 +0000
Subject: * string.c: add internal API rb_str_locktmp_ensure().

* io.c (io_fread): use rb_str_locktmp_ensure().
  [ruby-core:56121] [Bug #8669]

* test/ruby/test_io.rb: add a test for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42212 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 469498cb0c..55e034e3a1 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2801,4 +2801,18 @@ End
       end
     }
   end if /mswin|mingw/ =~ RUBY_PLATFORM
+
+  def test_read_unlocktmp_ensure
+    bug8669 = '[ruby-core:56121] [Bug #8669]'
+
+    str = ""
+    r, = IO.pipe
+    t = Thread.new { r.read(nil, str) }
+    sleep 0.1 until t.stop?
+    t.raise
+    sleep 0.1 while t.alive?
+    assert_nothing_raised(RuntimeError, bug8669) { str.clear }
+  ensure
+    t.kill
+  end
 end
-- 
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